Radical Muslims Those illegals that choose to falsely claim refugee status. Any that are not within the total allowed and acceptable number within a quota. Those that can't prove they are capable of supporting themselves and family members. "boat" people. Anyone with a criminal record.
"Students" should lodge a bond to cover their "return home" costs.
We should take a leaf out of the motel industry book. They will put up a sign saying "No Vacancey".